Tempo
400-114-019-A 2008-11-05 2/3
s
Reinstall the thermostat faceplate on its base and secure it with
the screw. If there is a sticker on the screen, peel it off.
t
Apply power to the heating system. Verify the installation by
making sure that the heating system can be turned on or off by
increasing or decreasing the setpoint respectively.
u
Test the GFCI (refer to section 5).
NOTE: Keep the thermostat's air vents clean and unobstructed at all
times.
Set the DIP switches on the back of the thermostat faceplate
according to your preference and specific application.
3.1 Temperature Unit Setting (S1)
Use the S1 switch to configure the thermostat to display the
temperature in Fahrenheit (default) or Celsius.
3.2 Temperature Control Mode Setting (S2)
Use the S2 switch to configure the thermostat to control the floor tem-
perature, ambient air temperature, or a combination of ambient air
and floor temperature.
4.1
Temperature Display and Setting
The thermostat displays the current (measured) temperature. To view
the desired temperature, press either of the
buttons. The desired
temperature is displayed for 5 seconds.
To set a new temperature, press one of the
buttons repeatedly
until the desired temperature is displayed. To scroll faster, press and
hold the button.
4.2
Heat Intensity Indicator (
)
The heat intensity indicator is a graphic representation of how long
the floor heating system is turned on compared to how long it is
turned off in order to reach and maintain the set temperature. The
more bars means the longer the floor heating system is turned on.
4.3
Backlight button
The display illuminates for 5 seconds when the backlight button is
pressed and for 10 seconds when either of the
buttons is
pressed.
4.4
On/Off Switch
Use Off mode to turn off the floor heating system. This mode can be
used when you are away for an extended period of time such as a
vacation or during warmer months. In Off Mode, the thermostat
screen becomes blank but the settings are not erased.
This thermostat has a built-in GFCI (Ground Fault Circuit Interrupter).
The GFCI protects against risk of electrocution caused by a current
leakage. If the leakage current exceeds 5 mA, the GFCI will automat-
ically trigger, thus cutting power to the floor heating system. To indi-
cate the fault, the
TEST
button at the top of the thermostat will
illuminate (red) and
GFI
will appear on the screen.
If the
TEST
button illuminates and
GFI
appears on the screen during
normal operation, check if the fault has been caused by an external
interference such as a halogen light or an electric motor. In this case,
reset and test the GFCI. However, if the fault occurs again for
unknown reasons, cut power to the floor heating system from the
main electrical panel and have the installation verified by an
electrician.
WARNING: The GFCI does not protect against electrical shocks
resulting from contact with both conductor wires.
5.1
GFCI Reset
To reset the GFCI, switch the thermostat to Off and back to On. The
TEST
button light will go off and
GFI
will disappear from the screen.
5.2
GFCI Test
To ensure the GFCI is always in working order, test it once the ther-
mostat is installed and test it every month thereafter.
n
Increase the temperature sufficiently to start heating.
o
Wait for about 5 seconds until the heat intensity indicator (
)
appears on the screen.
p
Press the
TEST
button at the top of the thermostat.
• If the
TEST
button does NOT illuminate,
the test has failed
.
Cut power to the heating system at the main electrical panel,
have an electrician verify the installation and, if necessary,
replace the thermostat.
p
DIP Switch Settings
3.
F
:
To select the F mode. In this mode, the thermostat controls the
floor temperature.
AF
: To select the A or AF mode (default setting).
NOTE: If the S2 switch is placed on AF and the floor sensor is
connected, the thermostat will operate in AF mode. If the S2
switch is placed on AF and the floor sensor is NOT connected,
the thermostat will operate in A mode.
In A mode, the thermostat controls the ambient air
temperature. This setting is useful if the floor temperature
sensor is damaged or not installed.
In AF mode, the thermostat controls the ambient air
temperature and maintains the floor temperature within
desired limits. This control is for advanced users only
(refer to section 7.1).
Faceplate
Power base
Air vents
Air vents
q
Basic Operation
4.
r
GFCI
5.
400-114-019-A (Nuheat) ENG.fm Page 2 Wednesday, November 5, 2008 9:24 AM
